Rectifier-anode.



E. F. SIPHER. vRECTIFIER ANODE. .APPLICATION- FILED JUNE 9 |9I4.

Patented Feb, 8,1916.

INVENIQR Edmundfzpher:

V MTORNEY WITNESSES narran amines maaar carina.

EDT/[UND F. SIPHER, OF VIILKINSBURG, PENNSYLVANIA, ASSIGNOB, T) WESTINGHOSE ELECTRIC AND MANUFACTURING COMPANY, CORPORATION 0F PENNSYLVANIA.

RECHNER-enana.

ASpecification of Letters Patent.

` i rateatea neas, wie.

Application led .Tune 9, 1914. Serial No. 844,107.

To all 'whom it may concern:

Be it known that I, EDMUND F. SIrHER, a citizen of the United States, and a resident of VVilkinsburg, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Rectifier- Anodes, of which the following is a specilication. p v

My invention relates to hollow electrodes for vacuum electric apparatus and it has for its object to provide an electrode of the character specified that shall be cheap and rugged in construction, capable of readily transmitting heat to cooling fluid contained therein, and capable of maintaining a high vacuum.

The single ligure of the accompanying drawing is a view, partially in section and partially in elevation, of an anode embodying my invention.

In the operation 'of vapor rectifiers and like apparatus, it' isflessential that the temperature of the anodes be maintained within reasonably low limits in order that the negative electrode reluctance thereof shall be v maintained at a high figure and short circuiting prevented. The customary method employed for controlling the anode temperature is to pass water or other suitable cooling fluid through the interior: thereof. This necessitates the construction. of a hollow electrode that shall be absolutely vacuum tight, in order that the vacuum of the container shall not be impaired, and that shall also have relatively thin walls in order that there may be a rapid transfer of heat to the cooling luid. By my invention, I attain these results in a simple and eective `manner.

Referring tothe drawing, the shankV 1 of my electrode ie cemposed of a tube of steel or other suitable metal having comparatively thick walls in order to have mechanical strength. A. cap 2 of relatively thin ma` terial, such, for example, as sheet steel, is welded to the end of the tube Il as shown at 3. I have found that it is extremely diiicult to provide a weld at the point 3 that will be absolutely gas tight and, accordingly, I attach a flange member l to the inner surface of the cap 2 by any suitable means, such as welding, shown at 5. The inner surface of the flange 4 is threaded, as shown at 6, and a tube 7, for. conveying cooling fluid to the interior of the cap 2, engages the threaded portion. The annular space between the tube 7 and the tube l is filled with mercury, as shown at 8, in order to seal the joint 3.

By this structure, I obtain an electrode of great mechanical strength, good heat-radiating properties and absolutely gas-tight construction, under all conditions.

I claim as my invention:

l. A hollow electrodefor vacuum electric apparatus comprising a hollow stem having comparatively thick walls and a head attached thereto having comparatively thin walls.

2. A hollow electrode for vacuum electric apparatus comprising 'a hollew stem having thick walls and a head having thin walls welded thereto.

3. A hollow electrode for vacuum electric apparatus comprising a hollow` stem, a head united thereto, and a liquid seal covering the line of union.

4. A hollow electrode for vacuum electric apparatus comprising a hollow stem, a head united thereto, and a liouid seal within the anode and covering the line of union.

5. An' anode for vacuum electrie appara-` tus comprising a hollow lstem, a hollow head united thereto, an internal flange Aon the head, a tube attached thereto and projecting outwardly through the stelmnand a pool of sealing fluid in the annular space between said tube and the stem.

In testimony whereof, I have hereunto subscribed my name this 29th day of May 1914.

-EDMUND F.' siPHER. 

